Sound-absorbing and sound-insulating composite fiber cement board

Abstract

The invention relates to the technical field of building materials, in particular to a sound absorption and insulation composite fiber cement board which comprises a face board, a back board and a sound insulation board, the sound insulation board is arranged between the face board and the back board, and the face board and the back board are both made of composite fibers and cement materials; according to the sound-absorbing and sound-insulating composite fiber cement board disclosed by the invention, the panel, the back plate, the sound-insulating plate, the front reinforcing layer and the rear reinforcing layer are arranged, so that the panel, the back plate and the sound-insulating plate can play a role in inhibiting and absorbing medium-frequency-band sound waves and high-frequency-band sound waves; the front reinforcing layer and the rear reinforcing layer which are made of synthetic rubber materials can restrain transmission of low-frequency-band sound waves and medium-low-frequency-band sound waves, so that the sound waves of the sound-absorption and sound-insulation composite fiber cement board from the low frequency band to the high frequency band can be restrained, the sound-insulation effect of the sound-absorption and sound-insulation composite fiber cement board is improved, and meanwhile, the sound-absorption and sound-insulation composite fiber cement board can be used for sound-absorption and sound-insulation. The front reinforcing layer and the rear reinforcing layer which are made of the synthetic rubber material have elasticity and toughness, so that the toughness of the sound-absorbing and sound-insulating composite fiber cement board is improved.

Description

Technical Field

[0001] The invention relates to the technical field of building materials, in particular to a sound-absorbing and sound-insulating composite fiber cement board. Background Art

[0002] Composite fiber cement board is a kind of building board, which uses cement matrix as the main body of the board, and adds glass fiber, carbon fiber or natural fiber as reinforcing material in the cement matrix, and is made through mixing, pressure molding (or natural molding), and autoclaving and curing. Compared with wood board, gypsum board and pure cement board, composite fiber cement board combines the strength of cement material and the toughness of fiber material, has better crack resistance, and is not easily affected by insects and corrosion. At the same time, the cement matrix makes the composite fiber cement board have good moisture resistance and fire resistance.

[0003] Since the composite fiber cement board has a high density and no transparent pore structure, the composite fiber cement board itself has the effect of blocking sound waves, but the thickness of the composite fiber cement board is limited and the internal structure is continuous. Therefore, in some places such as recording studios, shopping malls, commercial buildings, exhibition halls and concert halls, a single-layer composite fiber cement board cannot meet the sound insulation requirements; In response to this problem, the prior art provides some solutions. For example, the utility model patent with application number 202122181336.0 provides a new material composite cement board with a sound insulation structure. The utility model provides a shock-absorbing isolation mechanism. Noise or impact will cause the cement board to shake. When the cement board shakes, the internal shock-absorbing mechanism buffers and dampens the cement board, which can effectively reduce the shaking and impact of the cement board. At the same time, sound insulation cotton is set inside the cement board to absorb the noise entering the cement board and improve the sound insulation effect of the cement board. However, the internal structure of this structural solution is numerous, the production cost and processing cost are high, which is not conducive to mass production, and the overall weight of the cement board is large, which is not conducive to transportation and on-site construction. For example, the utility model patent with application number 202323281953.3 provides a sound-absorbing and sound-insulating composite fiber cement board. The utility model is implemented by setting a first functional layer including a mineral wool layer and a rubber isolation pad layer, wherein the mineral wool layer is an excellent sound-absorbing material, which can effectively absorb sound waves and reduce noise propagation, thereby significantly improving the sound insulation effect; however, the installation method of this technical solution is more complicated, which is not conducive to on-site construction. Summary of the invention

[0004] The object of the present invention is to provide a sound-absorbing and sound-insulating composite fiber cement board to solve the problem of poor sound insulation effect of the composite fiber cement board and solve the problems existing in the prior art solutions.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A sound-absorbing and sound-insulating composite fiber cement board comprises a panel, a back panel and a sound insulation board, wherein the sound insulation board is arranged between the panel and the back panel, and the panel and the back panel are both made of composite fiber and cement materials; specifically, the sound insulation board is made of polyurethane material, and its thickness is 2 / 5 to 3 / 5 of the total thickness of the sound-absorbing and sound-insulating composite fiber cement board, the sound insulation board is provided with a plurality of sound-absorbing holes in an equidistant array, and the plurality of sound-absorbing holes completely penetrate the front and rear sides of the sound insulation board, a front reinforcing layer is arranged between the panel and the sound insulation board, a rear reinforcing layer is arranged between the back panel and the sound insulation board, the front reinforcing layer and the rear reinforcing layer are both made of synthetic rubber material, the panel, the front reinforcing layer, the sound insulation board, the rear reinforcing layer and the back panel are of equal width and length, and are all bonded with engineering glue.

[0007] The panel and backboard are made of composite fiber and cement materials. The density of the panel and backboard is high, which is helpful to block the transmission of sound waves. The structure of the cement board is continuous and has no permeable pore structure, which is helpful to reduce the penetration of sound waves. At the same time, by using polyurethane foam as the material of the sound insulation board, the porous structure of the polyurethane foam is helpful to reduce the propagation of sound waves, and the thickness of the sound insulation board is 2 / 5 to 3 / 5 of the sound-absorbing and sound-insulating composite fiber cement board, which reduces the propagation speed and energy of sound, and has a good sound insulation performance for the mid-frequency band sound waves of 500Hz to 2000Hz and 20 Moreover, by respectively setting a front reinforcement layer and a rear reinforcement layer on the front and rear sides of the isolation board, and the front reinforcement layer and the rear reinforcement layer are made of synthetic rubber material, the elasticity of the rubber can suppress the transmission of low-frequency sound waves of 20Hz to 500Hz and medium-low-frequency sound waves of 200Hz to 1000Hz, so that the sound-absorbing and sound-insulating composite fiber cement board can suppress sound waves in the low-frequency to high-frequency bands, thereby improving the sound insulation effect of the sound-absorbing and sound-insulating composite fiber cement board.

[0008] Furthermore, the panel and back panel are made of composite fiber and cement materials, which meet the strength, moisture resistance and fire resistance of the sound-absorbing and sound-insulating composite fiber cement board. At the same time, through the setting of the front reinforcement layer and the rear reinforcement layer, the front reinforcement layer and the rear reinforcement layer made of synthetic rubber material have elasticity and toughness, thereby improving the toughness of the sound-absorbing and sound-insulating composite fiber cement board.

[0009] Preferably, the sound insulation board includes a front sound insulation layer and a rear sound insulation layer, and an energy absorption layer is provided between the front sound insulation layer and the rear sound insulation layer. The thickness of the energy absorption layer is 0.5 to 1.0 mm, and the energy absorption layer is made of flexible materials including natural rubber, styrene-butadiene rubber, polyurethane rubber or chloroprene rubber.

[0010] Since the thickness of the panel and the front reinforcement layer is fixed, when the noise sound waves penetrate the panel and the front reinforcement layer to reach the sound insulation board, part of the sound waves need to pass through the sound insulation board before reaching the rear reinforcement layer. Since the thickness of the sound insulation board is 2 / 5 to 3 / 5 of the total thickness of the sound-absorbing and sound-insulating composite fiber cement board, the sound waves passing through the sound insulation board are gradually absorbed by the internal porous structure, thereby reducing the energy of this part of the sound waves when they reach the rear reinforcement layer; another part of the sound waves enter the sound-absorbing holes, and the sound waves entering the sound-absorbing holes will be reflected in the sound-absorbing holes. When the sound waves are reflected in the sound-absorbing holes, the energy is gradually absorbed by the sound insulation board, thereby reducing the energy of the sound waves and achieving the function of sound absorption and noise reduction; however, the sound-absorbing holes are through-hole structures, and it is easy for some sound waves to directly pass through the sound-absorbing holes and directly act on the rear reinforcement layer. Since the rear reinforcement layer The thickness of the back plate is fixed, when the sound wave energy passing through the sound absorbing hole is sufficient to pass through the rear reinforcement layer and the back plate, this part of the sound wave will completely pass through the sound-absorbing and sound-insulating composite fiber cement board; for this reason, by setting the sound insulation board as the front sound insulation layer and the rear sound insulation layer, and setting an energy absorbing layer between the front sound insulation layer and the rear sound insulation layer, the sound waves entering the sound absorbing hole cannot directly pass through the sound absorbing hole to reach the rear reinforcement layer. After the sound wave hits the energy absorbing layer, since the energy absorbing layer in the sound absorbing hole is in a non-constrained state in the front and rear directions, the energy absorbing layer undergoes elastic deformation, has a buffering effect, and reflects the sound wave to the front reinforcement layer and the inner wall of the sound absorbing hole, thereby reducing the sound wave energy, preventing the sound wave from directly passing through the sound absorbing hole to reach the rear reinforcement layer, improving the sound absorption effect of the sound absorbing board and the sound absorbing hole, and ensuring the sound absorption and sound insulation effect of the sound absorbing and sound-insulating composite fiber cement board.

[0011] Preferably, a plurality of locking protrusions are provided on both the front and rear sides of the energy absorbing layer, and the plurality of locking protrusions are arranged in an equidistant array. The locking protrusion on the front side extends to be flush with the front end surface of the front sound insulation layer, and the locking protrusion on the rear side extends to be flush with the rear end surface of the rear sound insulation layer. Connecting through holes are coaxially arranged on the plurality of locking protrusions, and a plurality of countersunk threaded holes are provided on the rear end surface of the rear reinforcement layer, and the plurality of countersunk threaded holes respectively correspond to the plurality of connecting through holes, and countersunk screws are provided in the plurality of countersunk threaded holes, and the plurality of countersunk screws are threadedly connected to the front reinforcement layer.

[0012] Since the sound insulation board is made of polyurethane foam material, there is a porous structure in the sound insulation board, which is easy to collapse and shrink when subjected to extrusion force. The porous structure in the collapsed and shrunk area fails, thereby reducing the sound absorption and sound insulation effect of the sound insulation board; to this end, a plurality of locking protrusions are provided on the front and rear sides of the energy absorbing layer, and the front reinforcing layer, the sound insulation board, the energy absorbing layer and the rear reinforcing layer are connected by countersunk screws, and the front reinforcing layer and the rear reinforcing layer are supported by the locking protrusions to prevent the sound insulation board from shrinking due to external extrusion force. Shrinkage, deformation and collapse are prevented, thereby ensuring the integrity of the porous structure and sound-absorbing holes in the sound insulation board, and ensuring the sound absorption and sound insulation effect of the sound insulation board; at the same time, the countersunk screws are used for connection to ensure the flatness of the rear end surface of the rear reinforcement layer and the front end surface of the front reinforcement layer, which is beneficial to the bonding between the panel and the front reinforcement layer, the back panel and the rear reinforcement layer, avoiding hollowing or debonding between the panel and the front reinforcement layer, the back panel and the rear reinforcement layer, ensuring the stability of the bonding between the panel and the front reinforcement layer, the back panel and the rear reinforcement layer, and ensuring the board quality of the sound-absorbing and sound-insulating composite fiber cement board.

[0013] Preferably, a plurality of front strengthening protrusions are evenly distributed on the front end surface of the front strengthening layer, and a plurality of rear strengthening protrusions are evenly distributed on the rear end surface of the rear strengthening layer, and the cross-sections of the plurality of front strengthening protrusions and the rear strengthening protrusions are isosceles trapezoids, the arrangement directions of the front strengthening protrusions and the rear strengthening protrusions are perpendicular to each other, and the edges and corners of the front strengthening protrusions and the rear strengthening protrusions are provided with transition fillets, the rear end surface of the panel is provided with a front connecting groove that cooperates with the front strengthening protrusion, and the front end surface of the back panel is provided with a rear connecting groove that cooperates with the rear strengthening protrusion.

[0014] By arranging a plurality of front reinforcement protrusions on the front end surface of the front reinforcement layer and a plurality of rear reinforcement protrusions on the rear end of the rear reinforcement layer, and the arrangement directions of the front reinforcement protrusions and the rear reinforcement protrusions are perpendicular to each other, the vertically staggered front reinforcement protrusions and the rear reinforcement protrusions can improve the overall rigidity and stability of the sound-absorbing and sound-insulating composite fiber cement board. This reinforcement method disperses the load and stress so that the sound-absorbing and sound-insulating composite fiber cement board remains stable when subjected to impact loads and continuous loads, while reducing the risk of cracking or breaking of the sound-absorbing and sound-insulating composite fiber cement board due to bending or twisting, thereby ensuring the strength, toughness and integrity of the sound-absorbing and sound-insulating composite fiber cement board.

[0015] Furthermore, the cross-sections of the front reinforcement protrusions and the rear reinforcement protrusions are both isosceles trapezoidal. The isosceles trapezoidal cross-section can provide a larger moment of inertia, thereby improving the bending and twisting strength of the board. At the same time, this structural characteristic enables the sound-absorbing and sound-insulating composite fiber cement board to maintain its shape and stability when subjected to heavy loads or impact loads, thereby reducing deformation and ensuring the toughness of the sound-absorbing and sound-insulating composite fiber cement board. Moreover, transition fillets are provided at the corners of the isosceles trapezoid to avoid stress concentration at the corners in the connecting groove, thereby avoiding stress concentration and breakage of the panel and back panel during production or use, thereby ensuring the integrity and strength of the sound-absorbing and sound-insulating composite fiber cement board.

[0016] Preferably, the sound absorbing hole is circular, and the coverage area of ​​the sound absorbing hole accounts for 25% to 35% of the front end area of ​​the sound insulation board, and the diameter range of the sound absorbing hole is 18 to 25 mm.

[0017] Due to the symmetrical shape of the circular sound-absorbing holes, a uniform sound-absorbing effect can be provided, and the circular sound-absorbing holes help to ensure the structural integrity of the material. There is no angular structure in the circular sound-absorbing holes, and the stress distribution is more uniform. Especially when the sound insulation board is subjected to mechanical vibration and impact stress, the circular hole structure avoids stress concentration, thereby reducing the risk of material fatigue and stress concentration of the sound insulation board; at the same time, the processing of the circular sound-absorbing holes is relatively simple, which can be achieved by drilling or laser cutting technology, which is suitable for large-scale production and is conducive to reducing the processing cost of the sound-absorbing and sound-insulating composite fiber cement board.

[0018] Furthermore, after sound waves with different incident angles enter the circular sound-absorbing holes, the circular sound-absorbing holes can evenly disperse the sound waves, avoid concentrated reflection, and improve the overall sound absorption effect of the sound-absorbing holes; and the coverage rate of 25% to 35% and the aperture range of 18 to 25 mm can effectively absorb sound waves in the mid-frequency band and high-frequency band. Therefore, due to its uniform reflection of sound waves, the circular sound-absorbing holes are suitable for environments with concentrated sound sources, reducing the focus effect of sound and avoiding the concentration of sound waves in specific areas, such as recording studios, concert halls, conference rooms, and home theaters.

[0019] Preferably, the sound absorbing holes are hexagonal holes, and the coverage area of ​​the sound absorbing holes accounts for 30% to 40% of the front end area of ​​the sound insulation board, and the diameter of the inscribed circle of the sound absorbing holes ranges from 25 to 35 mm.

[0020] Compared with circular sound-absorbing holes, hexagonal sound-absorbing holes can be arranged more closely, and more sound-absorbing holes can be covered in a plane of the same area. And due to the hexagonal polygonal structure, while ensuring the opening area, the material integrity and mechanical strength of the sound insulation board can still be maintained, and stability can be maintained when subjected to physical pressure or vibration.

[0021] Furthermore, the sides and corners of the hexagon can provide more sound wave scattering points, which helps to disperse the incident sound waves more evenly and enhance the overall sound absorption performance of the sound insulation board; and the coverage rate of 30% to 40% and the inscribed circular aperture range of 25 to 35 mm can effectively absorb low-frequency and mid-frequency sound waves. Therefore, the hexagonal sound-absorbing holes are more suitable for environments with dispersed sound sources, such as offices, commercial buildings, libraries, shopping malls and exhibition halls.

[0022] Preferably, the side edges of the panel and the front reinforcing layer are aligned, the side edges of the back panel, the rear reinforcing layer and the sound insulation board are aligned, the front reinforcing layer is staggered with either the left side or the right side of the sound insulation board, and the misalignment range between the front reinforcing layer and the sound insulation board is 30 mm to 50 mm.

[0023] If two sound-absorbing and sound-insulating composite fiber cement boards are installed by splicing them flush against each other, even if the gap between the two sound-absorbing and sound-insulating composite fiber cement boards is bonded with sealant, sound waves can still easily pass through the gap between the two sound-absorbing and sound-insulating composite fiber cement boards, thereby reducing the sound insulation effect of the entire wall; for this reason, by setting the front reinforcement layer and any one of the left or right sides of the sound insulation board to be staggered, after the two sound-absorbing and sound-insulating composite fiber cement boards are spliced, the gap between the two boards is a curve, which improves the sound wave entering the gap and penetrating into the material. Reflection is beneficial to the absorption of sound wave energy by the sound insulation board, which can effectively block the direct transmission of sound waves through the joint between the two boards, reduce the possibility of sound wave leakage at the joint between the two boards, thereby improving the sound insulation effect of the entire wall; at the same time, the layout of the two sound-absorbing and sound-insulating composite fiber cement boards installed in an offset manner can better disperse the pressure and impact caused by external forces, improve the compression and bending resistance of the entire wall, and improve the stability and durability of the entire wall; and the offset installation provides more convenient installation positioning, which is beneficial to the on-site construction of the sound-absorbing and sound-insulating composite fiber cement boards.

[0024] Furthermore, by setting the offset between the front reinforcing layer and the sound insulation board to 30mm-50mm, the length of the joint gap between the two sound-absorbing and sound-insulating composite fiber cement boards is guaranteed, thereby ensuring the sound insulation effect at the gap between the two boards; at the same time, avoiding excessive offset to increase the width of the board, which is beneficial to transportation and installation, and excessive offset is likely to cause the strength of the area where the front reinforcing layer and the panel are suspended to decrease, avoiding the suspended front reinforcing layer and the panel from being broken by external force loads and impacts; ensuring the overall strength and transportation and installation of the sound-absorbing and sound-insulating composite fiber cement board.

[0025] Preferably, the surface of the energy absorbing layer is sprayed with a polyurethane coating or a fluorinated coating, and the coating thickness is 0.05 to 0.10 mm. Since the energy-absorbing layer is made of any one of natural rubber, styrene-butadiene rubber, polyurethane rubber or chloroprene rubber, the rubber material will harden and lose its elasticity and toughness due to oxidation, radiation or aging after a certain period of use, thereby reducing the sound insulation effect of the sound-absorbing and sound-insulating composite fiber cement board; for this reason, a polyurethane coating or a fluorinated coating is provided on the outer surface of the energy-absorbing layer, and the polyurethane coating or the fluorinated coating forms a protective barrier on the outer side of the energy-absorbing layer to prevent oxygen, ultraviolet rays and water vapor from directly acting on the energy-absorbing layer, thereby delaying the aging rate of the rubber and increasing the service life of the energy-absorbing layer; further, the coating thickness is set to 0.05mm~0.10mm, on the one hand, to ensure the protective effect of the coating on the energy-absorbing layer, on the other hand, to avoid the coating being too thick to reduce the flexibility of the energy-absorbing layer, to ensure the original physical properties of the energy-absorbing layer, thereby ensuring the sound-absorbing and sound-insulating effect of the sound-absorbing and sound-insulating composite fiber cement board; at the same time, to avoid the increase in material costs caused by excessive coating thickness, which is beneficial to reducing the processing cost of the sound-absorbing and sound-insulating composite fiber cement board.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The sound-absorbing and sound-insulating composite fiber cement board of the present invention is provided with a face plate, a back plate, a sound insulation plate, a front reinforcement layer and a rear reinforcement layer. The face plate, the back plate and the sound insulation plate can suppress and absorb mid-frequency sound waves and high-frequency sound waves. The front reinforcement layer and the rear reinforcement layer made of synthetic rubber material can suppress the transmission of low-frequency sound waves and mid-low-frequency sound waves, so that the sound-absorbing and sound-insulating composite fiber cement board can suppress sound waves in the low-frequency to high-frequency bands, thereby improving the sound insulation effect of the sound-absorbing and sound-insulating composite fiber cement board. At the same time, the front reinforcement layer and the rear reinforcement layer made of synthetic rubber material have elasticity and toughness, thereby improving the toughness of the sound-absorbing and sound-insulating composite fiber cement board.

[0028] 2. The present invention arranges an energy-absorbing layer in the sound insulation board. After the sound waves entering the sound-absorbing holes hit the energy-absorbing layer, the energy-absorbing layer in the sound-absorbing holes is in a non-constrained state in the front-to-back direction, so the energy-absorbing layer undergoes elastic deformation, plays a buffering effect, and reflects the sound waves to the front reinforcement layer and the inner wall of the sound-absorbing holes, thereby reducing the energy of the sound waves and preventing the sound waves from directly passing through the sound-absorbing holes to reach the rear reinforcement layer, thereby improving the sound-absorbing effect of the sound-absorbing board and the sound-absorbing holes and ensuring the sound-absorbing and sound-insulating effect of the sound-absorbing and sound-insulating composite fiber cement board.

[0029] 3. The present invention arranges the front reinforcement layer and any one of the left or right sides of the sound insulation board to be staggered and spliced. After the two sound-absorbing and sound-insulating composite fiber cement boards are spliced, the gap between the two boards is a curve, which improves the reflection of sound waves inside the material after entering the gap, is beneficial to the sound insulation board's absorption of sound wave energy, can effectively block the direct transmission of sound waves through the joint between the two boards, and reduce the possibility of sound wave leakage at the joint between the two boards, thereby improving the sound insulation effect of the entire wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the sound-absorbing and sound-insulating composite fiber cement board of the present invention;

[0031] Figure 2 An exploded view of a first embodiment of the sound-absorbing and sound-insulating composite fiber cement board of the present invention;

[0032] Figure 3 for Figure 2 A in the enlarged view;

[0033] Figure 4 It is a front view of a first embodiment of the sound-absorbing and sound-insulating composite fiber cement board of the present invention;

[0034] Figure 5 for Figure 4 Full section view at the middle BB;

[0035] Figure 6 It is a schematic diagram of staggered splicing of the sound-absorbing and sound-insulating composite fiber cement board of the present invention;

[0036] Figure 7 An exploded view of a second embodiment of the sound-absorbing and sound-insulating composite fiber cement board of the present invention;

[0037] Figure 8 for Figure 7 Enlarged view of point C in the figure.

[0038] In the figure: 1. panel; 101. front connecting groove; 2. back panel; 201. rear connecting groove; 3. sound insulation board; 301. sound absorbing hole; 302. front sound insulation layer; 303. rear sound insulation layer; 4. front reinforcement layer; 401. front reinforcement protrusion; 402. transition fillet; 5. rear reinforcement layer; 501. rear reinforcement protrusion; 502. countersunk threaded hole; 6. energy absorbing layer; 601. locking protrusion; 602. connecting through hole; 7. countersunk screw. DETAILED DESCRIPTION

[0039] See also Figures 1 to 8 The present invention provides a sound-absorbing and sound-insulating composite fiber cement board, and the technical solution is as follows:

[0040] See also Figure 1and Figure 2 A sound-absorbing and sound-insulating composite fiber cement board comprises a panel 1, a back panel 2 and a sound insulation board 3, wherein the sound insulation board 3 is arranged between the panel 1 and the back panel 2; specifically, as an embodiment of the present invention, the thickness of the sound insulation board 3 is 1 / 2 of the total thickness of the sound-absorbing and sound-insulating composite fiber cement board, a plurality of sound-absorbing holes 301 are arranged in an equidistant array on the sound insulation board 3, and the plurality of sound-absorbing holes 301 completely penetrate the front and rear sides of the sound insulation board 3, a front reinforcement layer 4 is arranged between the panel 1 and the sound insulation board 3, a rear reinforcement layer 5 is arranged between the back panel 2 and the sound insulation board 3, the panel 1, the front reinforcement layer 4, the sound insulation board 3, the rear reinforcement layer 5 and the back panel 2 are of equal width and length, and are all bonded with engineering glue.

[0041] See also Figures 2 to 5 The sound insulation board 3 includes a front sound insulation layer 302 and a rear sound insulation layer 303, and an energy absorption layer 6 is further provided between the front sound insulation layer 302 and the rear sound insulation layer 303; a plurality of locking protrusions 601 are provided on both the front and rear sides of the energy absorption layer 6, and the plurality of locking protrusions 601 are arranged in an equidistant array, the front locking protrusion 601 extends to be flush with the front end surface of the front sound insulation layer 302, and the rear locking protrusion 601 extends to be flush with the rear end surface of the rear sound insulation layer 303, and the plurality of locking protrusions 601 are coaxially provided with connecting through holes 602, and a plurality of countersunk threaded holes 502 are provided on the rear end surface of the rear reinforcement layer 5, and the plurality of countersunk threaded holes 502 respectively correspond to the plurality of connecting through holes 602, and the plurality of countersunk threaded holes 502 are provided with countersunk screws 7, and the plurality of countersunk screws 7 are threadedly connected to the front reinforcement layer 4.

[0042] See also Figure 2 and Figure 3 A plurality of front strengthening protrusions 401 are evenly arranged on the front end surface of the front strengthening layer 4, and a plurality of rear strengthening protrusions 501 are evenly arranged on the rear end surface of the rear strengthening layer 5. The cross-sections of the plurality of front strengthening protrusions 401 and the rear strengthening protrusions 501 are both isosceles trapezoids. The arrangement directions of the front strengthening protrusions 401 and the rear strengthening layer 5 are perpendicular to each other, and the edges and corners of the front strengthening protrusions 401 and the rear strengthening protrusions 501 are both provided with transition fillets 402. The rear end surface of the panel 1 is provided with a front connecting groove 101 that cooperates with the front strengthening protrusion 401, and the front end surface of the back panel 2 is provided with a rear connecting groove 201 that cooperates with the rear strengthening protrusion 501.

[0043] See also Figure 1 and Figure 4 The side edges of the panel 1 and the front reinforcing layer 4 are aligned, the side edges of the back panel 2, the rear reinforcing layer 5 and the sound insulation board 3 are aligned, and the front reinforcing layer 4 is staggered with any one of the left or right sides of the sound insulation board 3.

[0044] It should be noted that, in this specific embodiment, the panel 1 and the back panel 2 are both made of composite fiber and cement materials, the thickness of the panel 1 is 12 mm, the thickness of the back panel 2 is 8 mm, the sound insulation board 3 is made of polyurethane material, the thickness of the sound insulation layer is 32 mm, the front reinforcement layer 4 and the rear reinforcement layer 5 are both made of chloroprene rubber, the thickness of the front reinforcement layer 4 and the rear reinforcement layer 5 are both 4 mm, the energy absorption layer 6 is made of chloroprene rubber material, the thickness of the energy absorption layer 6 is 0.5 mm, and the surface of the energy absorption layer 6 is sprayed with a polyurethane coating or a fluorinated coating with a coating thickness of 0.06 mm. The sound absorption hole 301 is a hexagonal hole, and the coverage area of ​​the sound absorption hole 301 accounts for 36% of the front end area of ​​the sound insulation board 3, and the inscribed circle diameter range of the sound absorption hole 301 is 27 mm.

[0045] The following describes the production process of the sound-absorbing and sound-insulating composite fiber cement board provided in this embodiment:

[0046] Step 1: Use a mold to press and produce the sound insulation board 3;

[0047] Step 2: Use a mold to produce the front reinforcement layer 4, the rear reinforcement layer 5 and the energy absorption layer 6 by compression molding;

[0048] Step 3: forming the front panel 1 and the back panel 2 by press forming, and curing them by steam to a set strength;

[0049] Step 4: Combine the front reinforcing layer 4, the front sound insulation layer 302, the energy absorption layer 6, the rear sound insulation layer 303 and the rear reinforcing layer 5, and bond them together with engineering glue, and lock the front reinforcing layer 4, the energy absorption layer 6 and the rear reinforcing layer 5 with countersunk screws 7;

[0050] Step 5: Apply engineering glue between the front reinforcing layer 4 and the panel 1, between the rear reinforcing layer 5 and the backboard 2, and bond the front reinforcing layer 4 and the panel 1, and the rear reinforcing layer 5 and the backboard 2. After waiting for the glue to dry, the production of the sound-absorbing and sound-insulating composite fiber cement board is completed.

[0051] As another embodiment of the present invention, refer to Figure 7 and Figure 8 , which is different from the previous embodiment, the sound absorbing hole 301 is circular, and the coverage area of ​​the sound absorbing hole 301 accounts for 30% of the front end area of ​​the sound insulation board 3, and the diameter range of the sound absorbing hole 301 is 20 mm. Other configurations are the same as the previous embodiment and will not be repeated here.

[0052] The production process of the sound-absorbing and sound-insulating composite fiber cement board of this embodiment is described below:

[0053] Step 1: drilling a sound-absorbing hole 301 on the complete sound insulation board 3;

[0054] Step 2: Use a mold to produce the front reinforcement layer 4, the rear reinforcement layer 5 and the energy absorption layer 6 by compression molding;

[0055] Step 3: forming the front panel 1 and the back panel 2 by press forming, and curing them by steam to a set strength;

[0056] Step 4: Combine the front reinforcing layer 4, the front sound insulation layer 302, the energy absorption layer 6, the rear sound insulation layer 303 and the rear reinforcing layer 5, and bond them together with engineering glue, and lock the front reinforcing layer 4, the energy absorption layer 6 and the rear reinforcing layer 5 with countersunk screws 7;

[0057] Step 5: Apply engineering glue between the front reinforcing layer 4 and the panel 1, between the rear reinforcing layer 5 and the backboard 2, and bond the front reinforcing layer 4 and the panel 1, and the rear reinforcing layer 5 and the backboard 2. After waiting for the glue to dry, the production of the sound-absorbing and sound-insulating composite fiber cement board is completed.

[0058] The above two specific embodiments of the present invention are described in detail in conjunction with the accompanying drawings, but the present invention is not limited to the embodiments described above. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. A sound-absorbing and sound-insulating composite fiber cement board, comprising a panel (1), a back panel (2) and a sound insulation board (3), wherein the sound insulation board (3) is arranged between the panel (1) and the back panel (2), and the panel (1) and the back panel (2) are both made of composite fiber and cement material, characterized in that: The sound insulation board (3) is made of polyurethane material, and its thickness is 2 / 5 to 3 / 5 of the total thickness of the sound-absorbing and sound-insulating composite fiber cement board. The sound insulation board (3) is provided with a plurality of sound-absorbing holes (301) in an equidistant array, and the plurality of sound-absorbing holes (301) completely penetrate the front and rear sides of the sound insulation board (3). A front reinforcing layer (4) is provided between the panel (1) and the sound insulation board (3), and a rear reinforcing layer (5) is provided between the back panel (2) and the sound insulation board (3). The front reinforcing layer (4) and the rear reinforcing layer (5) are both made of synthetic rubber material. The panel (1), the front reinforcing layer (4), the sound insulation board (3), the rear reinforcing layer (5) and the back panel (2) are of equal width and length, and are all bonded together using engineering glue.

2. The sound-absorbing and sound-insulating composite fiber cement board according to claim 1, characterized in that: The sound insulation board (3) comprises a front sound insulation layer (302) and a rear sound insulation layer (303), and an energy absorption layer (6) is provided between the front sound insulation layer (302) and the rear sound insulation layer (303). The thickness of the energy absorption layer (6) is 0.5 mm to 1.0 mm, and the energy absorption layer (6) is made of a flexible material including natural rubber, styrene-butadiene rubber, polyurethane rubber or chloroprene rubber.

3. The sound-absorbing and sound-insulating composite fiber cement board according to claim 2, characterized in that: A plurality of locking protrusions (601) are provided on both the front and rear sides of the energy absorbing layer (6), and the plurality of locking protrusions (601) are arranged in an equidistant array. The locking protrusion (601) on the front side extends to be flush with the front end surface of the front sound insulation layer (302), and the locking protrusion (601) on the rear side extends to be flush with the rear end surface of the rear sound insulation layer (303). A connecting through hole (602) is coaxially arranged on the plurality of locking protrusions (601). A plurality of countersunk threaded holes (502) are provided on the rear end surface of the rear reinforcement layer (5), and the plurality of countersunk threaded holes (502) respectively correspond to the plurality of connecting through holes (602). Countersunk screws (7) are arranged in the plurality of countersunk threaded holes (502), and the plurality of countersunk screws (7) are threadedly connected to the front reinforcement layer (4).

4. The sound-absorbing and sound-insulating composite fiber cement board according to claim 2, characterized in that: A plurality of front reinforcing protrusions (401) are evenly arranged on the front end surface of the front reinforcing layer (4), and a plurality of rear reinforcing protrusions (501) are evenly arranged on the rear end surface of the rear reinforcing layer (5). The cross-sections of the plurality of front reinforcing protrusions (401) and the rear reinforcing protrusions (501) are all isosceles trapezoids. The arrangement directions of the front reinforcing protrusions (401) and the rear reinforcing protrusions (501) are perpendicular to each other, and the edges and corners of the front reinforcing protrusions (401) and the rear reinforcing protrusions (501) are both provided with transition fillets (402). The rear end surface of the panel (1) is provided with a front connecting groove (101) that cooperates with the front reinforcing protrusions (401), and the front end surface of the back panel (2) is provided with a rear connecting groove (201) that cooperates with the rear reinforcing protrusions (501).

5. The sound-absorbing and sound-insulating composite fiber cement board according to claim 4, characterized in that: The sound absorbing hole (301) is circular, and the coverage area of ​​the sound absorbing hole (301) accounts for 25% to 35% of the front end area of ​​the sound insulation board (3), and the diameter of the sound absorbing hole (301) ranges from 18 mm to 25 mm.

6. The sound-absorbing and sound-insulating composite fiber cement board according to claim 4, characterized in that: The sound absorbing hole (301) is a hexagonal hole, and the coverage area of ​​the sound absorbing hole (301) accounts for 30% to 40% of the front end area of ​​the sound insulation board (3), and the diameter of the inscribed circle of the sound absorbing hole (301) ranges from 25 mm to 35 mm.

7. The sound-absorbing and sound-insulating composite fiber cement board according to claim 4, characterized in that: The side edges of the panel (1) and the front reinforcing layer (4) are aligned, the side edges of the back panel (2), the rear reinforcing layer (5) and the sound insulation board (3) are aligned, the front reinforcing layer (4) and the sound insulation board (3) are staggered and spliced ​​on either the left side or the right side, and the offset between the front reinforcing layer (4) and the sound insulation board (3) is in the range of 30 mm to 50 mm.

8. The sound-absorbing and sound-insulating composite fiber cement board according to claim 2, characterized in that: The surface of the energy absorbing layer (6) is sprayed with a polyurethane coating or a fluorinated coating, and the coating thickness is 0.05 mm to 0.10 mm.

Images